Add framework for sending feedback for Blimp.

blimp/client/core/feedback/blimp_feedback_data.cc

Index: blimp/client/core/feedback/blimp_feedback_data.cc
diff --git a/blimp/client/core/feedback/blimp_feedback_data.cc b/blimp/client/core/feedback/blimp_feedback_data.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b9b4a99801deb2d6d98ffc22842ed51e12c06c69
--- /dev/null
+++ b/blimp/client/core/feedback/blimp_feedback_data.cc
@@ -0,0 +1,18 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "blimp/client/core/feedback/blimp_feedback_data.h"
+
+namespace blimp {
+namespace client {
+const char kFeedbackSupportedKey[] = "Blimp Supported";
+
+std::unordered_map<std::string, std::string> CreateBlimpFeedbackData() {
+  std::unordered_map<std::string, std::string> data;
+  data.insert(std::make_pair(kFeedbackSupportedKey, "true"));
+  return data;
+}
+
+}  // namespace client
+}  // namespace blimp